/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

#include "gc/shared/genOopClosures.hpp"

#include "gc/shared/taskqueue.hpp"

#include "memory/padded.hpp"

// Closures for ParNewGeneration

class ParScanThreadState;

class ParNewGeneration;

typedef Padded<OopTaskQueue> ObjToScanQueue;

typedef GenericTaskQueueSet<ObjToScanQueue, mtGC> ObjToScanQueueSet;

class ParallelTaskTerminator;

class ParScanClosure: public OopsInClassLoaderDataOrGenClosure {

 protected:

  ParScanThreadState* _par_scan_state;

  ParNewGeneration*   _g;

  HeapWord*           _boundary;

  template <class T> void inline par_do_barrier(T* p);

  template <class T> void inline do_oop_work(T* p,

                                             bool gc_barrier,

                                             bool root_scan);

 public:

  ParScanClosure(ParNewGeneration* g, ParScanThreadState* par_scan_state);

};

class ParScanWithBarrierClosure: public ParScanClosure {

 public:

  ParScanWithBarrierClosure(ParNewGeneration* g,

                            ParScanThreadState* par_scan_state) :

    ParScanClosure(g, par_scan_state) {}

  virtual void do_oop(oop* p);

  virtual void do_oop(narrowOop* p);

};

class ParScanWithoutBarrierClosure: public ParScanClosure {

 public:

  ParScanWithoutBarrierClosure(ParNewGeneration* g,

                               ParScanThreadState* par_scan_state) :

    ParScanClosure(g, par_scan_state) {}

  virtual void do_oop(oop* p);

  virtual void do_oop(narrowOop* p);

};

class ParRootScanWithBarrierTwoGensClosure: public ParScanClosure {

 public:

  ParRootScanWithBarrierTwoGensClosure(ParNewGeneration* g,

                                       ParScanThreadState* par_scan_state) :

    ParScanClosure(g, par_scan_state) {}

  virtual void do_oop(oop* p);

  virtual void do_oop(narrowOop* p);

};

class ParRootScanWithoutBarrierClosure: public ParScanClosure {

 public:

  ParRootScanWithoutBarrierClosure(ParNewGeneration* g,

                                   ParScanThreadState* par_scan_state) :

    ParScanClosure(g, par_scan_state) {}

  virtual void do_oop(oop* p);

  virtual void do_oop(narrowOop* p);

};

class ParScanWeakRefClosure: public ScanWeakRefClosure {

 protected:

  ParScanThreadState* _par_scan_state;

  template <class T> inline void do_oop_work(T* p);

 public:

  ParScanWeakRefClosure(ParNewGeneration* g,

                        ParScanThreadState* par_scan_state);

  virtual void do_oop(oop* p);

  virtual void do_oop(narrowOop* p);

};

class ParEvacuateFollowersClosure: public VoidClosure {

 private:

  ParScanThreadState* _par_scan_state;

  ParScanThreadState* par_scan_state() { return _par_scan_state; }

  // We want to preserve the specific types here (rather than "OopClosure")

  // for later de-virtualization of do_oop calls.

  ParScanWithoutBarrierClosure* _to_space_closure;

  ParScanWithoutBarrierClosure* to_space_closure() {

    return _to_space_closure;

  }

  ParRootScanWithoutBarrierClosure* _to_space_root_closure;

  ParRootScanWithoutBarrierClosure* to_space_root_closure() {

    return _to_space_root_closure;

  }

  ParScanWithBarrierClosure* _old_gen_closure;

  ParScanWithBarrierClosure* old_gen_closure () {

    return _old_gen_closure;

  }

  ParRootScanWithBarrierTwoGensClosure* _old_gen_root_closure;

  ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure () {

    return _old_gen_root_closure;

  }

  ParNewGeneration* _par_gen;

  ParNewGeneration* par_gen() { return _par_gen; }

  ObjToScanQueueSet*  _task_queues;

  ObjToScanQueueSet*  task_queues() { return _task_queues; }

  ParallelTaskTerminator* _terminator;

  ParallelTaskTerminator* terminator() { return _terminator; }

 public:

  ParEvacuateFollowersClosure(

    ParScanThreadState* par_scan_state_,

    ParScanWithoutBarrierClosure* to_space_closure_,

    ParScanWithBarrierClosure* old_gen_closure_,

    ParRootScanWithoutBarrierClosure* to_space_root_closure_,

    ParNewGeneration* par_gen_,

    ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure_,

    ObjToScanQueueSet* task_queues_,

    ParallelTaskTerminator* terminator_);

  virtual void do_void();

};